\begin{abstract}
This work presents an analysis of Semantic Web applied to healthcare domain that, as will be seen, is one of the most responsible for it's development. Since the World Wide Web project the Semantic Web functionalities was predicted, however, not yet had enough resources for its implementation.
With the evolution of Web assisted by W3C from it's publication as a Internet service, technologies that were been developed, in 2001, enabled the beginning of Semantic Web development. In this year, the World Wide Web and Semantic Web creator, Tim Berners-Lee, published an article that showed new intelligent services through the Web, predicting even a greater use in the healthcare area.
Today we know that healthcare area is in the forefront of use Semantic Web technologies, being one of the greater responsible for conceptual and technology advances. Various applications born with different scopes and solutions, shows the big Semantic Web potential and heterogeneity, not applied in one restricted area, but in all Web.
In this work we present the general concepts of Web, showing his development from his project. The web base languages are showed, that after a development stage, culminated in the Semantic Web base. Semantic Web also have it's general concepts presented, like it's base languages. We show some use possibilities of Semantic Web and areas that can be applied. It's structure are presented together in their base languages. So, the healthcare area is explored, it's importance is presented and the activities that was developed in this area. Between them we have the data exchange and knowledge representation standardization, that generates interoperability. Government initiatives in activities that evolves the two areas are presented too, like the Brazilian case, and applications that uses semantic resources in a effective way in the healthcare area.
From this analysis we can conclude that semantic web has a big potential, not only for the healthcare area, but for all the web. However, much of what were predicted was not developed yet, which is due to the fact that many structural parts are still in development and the lack of consensus on some points. But, we believe that healthcare area must continue the accelerate development of Semantic Web, that is a good practice for all because, through development of localized solutions, the Semantic Web grows in a global way.

\textbf{Keywords: Semantic Web, Healthcare, Web, Internet}
\end{abstract}
